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Old 10-30-2009, 12:22 PM   #1
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Questions?? ENGINE BEARINGS

HELLO, I WOULD LIKE TO SOLVE A PROBLEM OF MY OWN. DO THE BEARINGS HAVE ANY ISSUE IN SEALING A NITRO ENGINE, BOTH IN AND OUT BEARINGS OF THE CRANK. DO WE HAVE TO CHANGE THE BEARINGS AFTER A CERTAIN PERIOD? DO THE BEARINGS IN ANY WAY SEAL THE ENGINE FROM ANY AIR LEAKS? THANK YOU.
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Old 10-30-2009, 01:11 PM   #2
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HELLO, I WOULD LIKE TO SOLVE A PROBLEM OF MY OWN. DO THE BEARINGS HAVE ANY ISSUE IN SEALING A NITRO ENGINE, BOTH IN AND OUT BEARINGS OF THE CRANK. DO WE HAVE TO CHANGE THE BEARINGS AFTER A CERTAIN PERIOD? DO THE BEARINGS IN ANY WAY SEAL THE ENGINE FROM ANY AIR LEAKS? THANK YOU.

If you have a front bearing with a worn seal you will experience an air leak.
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Old 10-30-2009, 07:03 PM   #3
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If you have a front bearing with a worn seal you will experience an air leak.
Even new bearings leak but a worn bearing will leak enough 2 cause idling issue's
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Old 10-30-2009, 07:07 PM   #4
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I find that high end TKO ceramic bearings last about 5 gallons. I never replace bearings with stock and some engine builders will advise to replace the front bearing every gallon, that seems a little excessive to me but that's what I have been told.
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Old 10-31-2009, 09:29 AM   #5
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THANK YOU FOR ALL OF YOUR ADVICE. YOU GUYS WERE REALLY HELPFUL!!
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Old 10-31-2009, 12:12 PM   #6
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I find that high end TKO ceramic bearings last about 5 gallons. I never replace bearings with stock and some engine builders will advise to replace the front bearing every gallon, that seems a little excessive to me but that's what I have been told.
replace when they leak horribly ., dirt goes in and out of front bearings

every gallon may seem excessive for replacement but if the bearing leaks , the bearing leaks .


new bearings can leak as soon as you start using them but that does not mean they are leaking bad enough to cause tuning issues
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Old 10-31-2009, 02:29 PM   #7
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replace when they leak horribly ., dirt goes in and out of front bearings

every gallon may seem excessive for replacement but if the bearing leaks , the bearing leaks .


new bearings can leak as soon as you start using them but that does not mean they are leaking bad enough to cause tuning issues
That's exactly what I do when the front starts to leak I replace it. The rear will make strange noises and then I replace it as well.
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Old 11-01-2009, 10:31 AM   #8
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THANKS AGAIN GREAT ADVICE. LET'S KEEP UP THE GOOD WORK!!
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Old 11-01-2009, 06:37 PM   #9
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That's exactly what I do when the front starts to leak I replace it. The rear will make strange noises and then I replace it as well.
tell tale sign for rear bearing issue is a funny rattling reverberating sound that is amplified by the cooling head . if you touch the head and it quiets down you might have an iffy rear main bearing
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Old 11-01-2009, 08:46 PM   #10
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replace when they leak horribly ., dirt goes in and out of front bearings

every gallon may seem excessive for replacement but if the bearing leaks , the bearing leaks .


new bearings can leak as soon as you start using them but that does not mean they are leaking bad enough to cause tuning issues
I've got a question Monty. My front bearing in my grenade seems to be leaking, but not tuning issues. After a dusty day of practice the bearing was coated in oiled dirt. Should i replace the bearing if it isn't giving tuning issues?
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Old 11-02-2009, 12:07 AM   #11
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My front bearing in my grenade seems to be leaking, but not tuning issues. After a dusty day of practice the bearing was coated in oiled dirt. Should i replace the bearing if it isn't giving tuning issues?
i wouldn't

I usually poke my fore finger and move it fore, aft, and sideways to check for play.

Talking about the rear bearing
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Old 11-02-2009, 09:46 AM   #12
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I've got a question Monty. My front bearing in my grenade seems to be leaking, but not tuning issues. After a dusty day of practice the bearing was coated in oiled dirt. Should i replace the bearing if it isn't giving tuning issues?
Not necessarily


But if it is leaving a good puddle of engine poo around the flywheel then you probably should .




There is really an engine named a grenade ?
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Old 11-02-2009, 01:38 PM   #13
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Not necessarily


But if it is leaving a good puddle of engine poo around the flywheel then you probably should .




There is really an engine named a grenade ?
Agreed!

And yes.... "Grenade".......... Only this one you throw after it blows up...

Actually I hear they are pretty darn good engines.
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Old 11-02-2009, 04:19 PM   #14
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Agreed!

And yes.... "Grenade".......... Only this one you throw after it blows up...

Actually I hear they are pretty darn good engines.

Yup Caster Grenade. Awesome engine, with extremely cheap parts. Similar to a Go engine.
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Old 11-04-2009, 12:16 AM   #15
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Default TKO or Nova bearings?

So the TKO bearings are good compared to the stock nova bearings? I've wanted to have some ceramic bearings in my engines, but never had a problem with stock ones either. The double shielded front bearings don't leak a bit. the older one sided ones did just slightly and never had an issue, now the rear bearing rattle sounds familiar, never knew what it was...Oopps...
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